The chapter on medieval Islam wasn't very deep, otherwise this is truly excellent, particularly when covering the very complicated 20th century. I don't have much more to say, because it is so good, except that I should try to get my brother to review it.
It says how long ago something was said, so you can tell last month
from 2014 without doing the arithmetic. Full and green is recent; it
drains and cools as the date gets older, and empties completely at about
6 years.
5d5 days ago
8mo8 months ago
2yr2 years ago
4yr4 years ago
9yr9 years ago
A striped bar means the date itself is an estimate — the source did
not carry an exact one. An entry with no date at all gets no bar.